Mirage v. Costco Wholesale Corporation
C.D. California · Jul 31, 2025
What happened in this matter?
The court admonished the plaintiff for citing non-existent case law, noting a potential failure to comply with the court's Standing Order regarding AI disclosure. The court warned that future citations to non-existent authority would trigger an order to show cause regarding sanctions.
- Why the court cared
- The court reasoned that the plaintiff's reliance on non-existent case law violated the court's Standing Order requiring disclosure and verification of AI-generated content, necessitating an admonishment to ensure future compliance with Rule 11 obligations.
- Why it matters now
- This case illustrates the enforcement of local standing orders requiring the disclosure and verification of AI-generated legal research. It highlights the risk of judicial admonishment when counsel fails to verify the existence of cited authorities.
Why this matter is tracked
In a slip-and-fall action, the plaintiff filed a motion to remand to state court, arguing against diversity jurisdiction. The court denied the motion, finding complete diversity existed. During its review, the court identified that the plaintiff cited a case, 'Martinez v. Ford Motor Co.', which the court could not locate. The court noted that if the plaintiff used artificial intelligence to generate the brief, they failed to comply with the court's Standing Order requiring disclosure and certification of AI-generated content. The court issued an admonishment, warning that future citations to non-existent authority would result in an order to show cause regarding potential sanctions.
This case illustrates the enforcement of local standing orders requiring the disclosure and verification of AI-generated legal research. It highlights the risk of judicial admonishment when counsel fails to verify the existence of cited authorities.
Record details
What the record establishes about AI use
The court noted the plaintiff cited non-existent cases and failed to comply with the Standing Order if AI was used.
Order denying Plaintiff's Motion to Remand.
Correction behavior is not separately verified in the current record.
Tracked discrepancy record
1 citation, quotation, or authority issues are recorded in the source dataset.
- Fabricated: Case Law | Plaintiff cited one or more purported cases labeled Martinez v. Ford Motor Co.; the Court was unable to find these cases, flagged possible AI use, and admonished Plaintiff for not complying with the Court's AI-disclosure Standing Order.
Questions this record answers
- What happened in Mirage v. Costco Wholesale Corporation?
- The court admonished the plaintiff for citing non-existent case law, noting a potential failure to comply with the court's Standing Order regarding AI disclosure. The court warned that future citations to non-existent authority would trigger an order to show cause regarding sanctions.
- Why does Mirage v. Costco Wholesale Corporation matter for legal AI risk?
- This case illustrates the enforcement of local standing orders requiring the disclosure and verification of AI-generated legal research. It highlights the risk of judicial admonishment when counsel fails to verify the existence of cited authorities.
- What does the public record establish about Mirage v. Costco Wholesale Corporation?
- The record summarizes the outcome described in the linked public source. The recorded document is hosted in the upstream publisher archive. This page is not a substitute for the complete docket, subsequent history, or jurisdiction-specific advice.
- Which source supports this Mirage v. Costco Wholesale Corporation summary?
- The recorded source is Damien Charlotin case archive. It is classified as publisher document archive; review the linked material and subsequent docket history before relying on this summary.
Related matters
Related by court, jurisdiction, tool, or classified failure pattern. Similarity does not imply the same facts or outcome.